Boot Times – Restart vs Power Off/Manual Start

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I am wondering why there is a vast difference in Boot time with these two different methods of restarting in Windows 10.

1. From Power Menu – Restart – takes 30 seconds to power off followed by 65 secs to User Logon.

2. From Power Menu – Shut Down – takes 20 secs to power off. Double click powers on again taking 28 secs to User Logon.

It is quite repeatable, but why should this be?

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Fast startup (also called Hybrid Shutdown or Hybrid Boot) introduced with Windows 8, applies to Shut down/Power up but not to Restart: Delivering fast boot times in Windows 8

It’s a setting at Control Panel, Power Options, System Settings; Turn on fast startup (recommended).

This helps start your PC faster after shutdown. Restart isn’t affected.

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Thanks, BruceR for the explanation and Link.
So Fast Startup involves a form of Hibernation writing a file and recovering it when you next power-on.

I found ‘Fast Startup’ is ON by default, and I tried unchecking it and the times for Restart, and Power off/Manual Restart were then much the same at about 100secs.

For Windows 10:-
Settings > System > Power & Sleep > Additional Power Settings > ‘Choose What the Power Buttons do’

Then click on ‘Change settings that are currently unavailable’ to allow a change to ‘Turn on fast startup (Recommended)’ in Shutdown settings.

Then ‘Save changes.’

I had noticed that Windows updates had not been ‘taking’ with a Shutdown and Manual Restart. I guess this explains why.
Always do a Restart to update Windows Update.

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